Tying machine



Jan. 23, 1945.` a. H. BUNN. 2,367,553

TYING MACHINE Jan. 23, 1945. B. H. BUNN Tune namur:

'Filed April 14, 1943:

'3 SheeItSf-Sheet 2 Jan. 23, 1945.

B. H. BUNN TYING 'MAcHINE Filed April V14, 1945 s sheets-Sheet s Patented Jan. 23, 1945 UNITED sTATEs PATENT OFFICE TYNG MUHNE Benjamin H. Bunn, Chicago. Ill., assigner to B. B.

Bunn Illino is(Jompany, Chicago, Ill., a corporation of Application Aprn 14, 1943, serial No. 482.958 zo cnam; (ci. loo-31) in my prior Patent No. 2,182,959 issued December.

in my said prior patent, stripping oi the encircling twine from the knotter beak during the knotting operation is eliected by a horizontally pivoted stripper which contactually underlies and is moved into stripping position in conjunction with the downward movement of an overlying flexible portion of the package-supporting table plate. Such arrangement presupposes the tying of a compressible package, the flexible portion of the plate when ilexed upwardly effecting compression of the package by causing the twine laid thereabout and held by the tying mechanism to be drawn more tightly against the top and sides of the package. Upward movement of the flexible plate is accomplished bythe stripper as the latter is pushed up clear of the horizontal sweep executed by the hotter beak for looping the twine about itself. Then the stripper is released and spring returned to stripping position where it engages the twine loop'and holds it while the beak is withdrawn and pulls they ends of the twine on through the loop to complete the knot.

A stripper operating as described is impractical where the packages to be tied are substantially incompressible due either to the particular nature of the package contents or of the container in which they are packed. Upward ilexing of the supporting plate would in such case overstretch and probably snap the twine ties. It therefore becomes important when tyingV incompressible packages to maintain the supporting plate stationary and, in order to avoid slackness in the twine wraps, relatively close to the knotter so that the normal elasticity of the twine will react against the slight stretching produced in wrapping and tying and thus absorb the slight overreach of twine necessary to accommodate the operating clearance between the knotter and the package.

Accordingly, a

type indicated which is particularly suitable for tying incompressible packages and bundles and in which stripping of the encircling twine from the knetter beak in the formation of the knot is enectively accomplished without movement of the package support.

A further object is to provide stripping means for a tying machine of the foregoing character which is adapted to derive its motion through being coupled in a novel manner with driven mechanism which is cooperative with but independent of the knotter. i

A further object of the invention is to provide an improved stripper which is adapted to be incorporated in a tying machine of existing design with but a minimum of alteration or redesign of any of the parts of such machine.

The foregoing, together with further' objects, a y

features and advantages of my invention, are set forth in the following description of certain specific embodiments thereof and illustrated in the accompanying drawings, wherein:

Fig. l is an elevation of the knotting mechanism and associated parts of a tying machine, generally correspondingy to Fig. 1 of my Patent Number 2,182,959 and similarly Ashowing the knetter beak an instant before snapping closed upon the twine ends, but omitting certain'of the parts which have been discarded in the present instance in view of the incorporation of my new stripper in the machine.

Fig. 2 is a schematic phantom perspective view,

looking partly from above and from the left ofv Fig. 1 and showing the parts of the knetter mechanism and the stripper in the relative positions they occupy at an earlier stage in the knotting cycle than shown in Fig. 1;

Fig. 3 is a schematic phantom perspective view similar to Fig. 2 but showing the parts ci the knotter and stripper mechanisms in the relative positions occupied at a stage in the knotting cycle following that shown in Fig. 1 and just before the encircling twine is stripped from the knetter beak in the tying of the knot;

principal object of the present invention is to provide a tying machine of the yshowing the parts in the relative Fig. 4 is a top plan view of the knotting and stripper mechanisms taken in a plane directly above the stripper and Vshowing the parts in the same relative positionsfas in Fig. 3;

Fig. 5 is a top plan -view similar to Fig. 4 but positions as in Fig. 2; v Fig. 6 is a. fragmentary perspective view on an enlarged scale showing the cooperative relationship of the knotter beak and the stripper nger as they appear, similarly as in Figs. 3.and 4; a moment before the stripping action;

Fig. '7 is an enlarged perspective view of the stripper guide; y

Fig. 8 is an enlarged perspective view of the stripper linger; f.

Fig. 9 is an elevation of the knotting mechaengaged by the latter.

nism and associated parts taken in substantially the same plane as Fig. 1 but showing certain modifications adapted for better accomodating elongated or roll type bundles.

Since the drawings and the following description are intended primarily to disclose my present improvements in a machine of the type disclosed in my previously mentioned prior patent, the reader is referred to such patent for a more complete description of the nature and operation of the parts shown which are common to this and the prior disclosure and for the mechanism by which such parts are mounted and operated in properly timed sequence. To assist the reader `in this respect, `the same reference characters i are employed herein as are used in the prior patent to identify the same or corresponding parts. All new reference characters added herein include the prex B and such new reference characters do not necessarily correspond with parts that perchance are identied by the same number, but without the prefix B, in my prior patent.

While for the purpose of illustration a package P of substantial size to be Wrapped is shown'in the drawings as of rectangular box-like form, it

.may of course be of other form or in the nature of a bundle, whether sheet wrapped or not. While the package P may, of course, be of such character as to be somewhat compressible in response to tightening of the tying string thereabout, fully consistent with operation of the present machine, the package will be considered in the following description as being substantially incompressible. This incompressibility may be, and usually is due to the character of the material in the package .wheier composed of a single item or an aggregation of separate items.

In tying the package P, it is set upon a table 64 (Fig. 1) carried by the general frame 50 of the machine, with one side of the package located against the shoulder formed by the downward oifsettingof a portion 84 of the table. Twine T has its end T1 (Fig. 2) caught between the block |20 and the twine catcher head or button |23 and is guided by the orbitally rotatable wrapping arm 92 to wrap around the package. Where the package is to have only one wrap, a knot will be formed after the wrapping arm has traveled once around its orbit in the direction indicated by arrow. Where the package is to be wrapped both longitudinally and transversely, a rst wrap 'P is laid about the package in a iirst rotation of the wrapping arm 92 and the package is then turned thru 90 relative to the plane of such wrap and the wrapping arm is again caused to rotate to lay the second wrap T3 about the package. At completion or the wrapping, a starting reach of twine T4 extends to the concatenation 'I5 whence it continues as the wrap- 'l2'2 which in turn, continues as the wrap 'Il'ci from the point where the twine interlinks at the concatenation T5. 'I'he nal wrap 'I'3 terminates in a short reach T which is caught between the rear face of the catcher head |23 and the front face of the block |20, being up to this point integral with'the succeeding lead-of! reach of the twine T.

During the rst wrap, a draw plate` |32 is so 'I'he draw plate |32 is mounted for horizontally sliding reciprocation on the main frame of the machine below a top plate B||l of the frame and is guided in a generally rectilinear path by pins A21 extending thru tandem slots A25 and A26 in the plate. An oiIset A26 at the rear of the forward slot A26 causes the forward projection carrying end of the plate to shift away from the reader Ainto the catcher-clearing position when the plate is moved to its forward limit.

Reciprocal motion is imparted to the draw plate |32 in timed coordination with operation of the rest of the machine by an upstanding arm of a bell crank |21 which is pivoted at |28 to a bracket carried by the machine frame. The free end of the bell crank arm engages in a downwardly opening bifurcation or slotted boss |3| which depends from the plate |32. After the twine erach 'I has been caught by the twine catcher, the draw plate |32 is slid to the extreme right. as viewed in Figs. 2. and 5, and the notched end of the extension passes over the twine catcher |23 and engages the terminating reach T which is thereby deflected under the adjacent lower side edge of the package into proximity to the lower starting reach TH Thereupon the closed jaws |59 and |60 which form the knotter beak are projected into the angle of the deilection bend in the twine reach T by forward rocking of the knotter carriage |48 upon its horizontal pivot pin as eiected by the rocker arm |50. Simultaneously the twine reach T4 is engaged within the groove |90 of a vertically swinging tip-up arm' lever |89 and lifted against the lower jaw of the beak and tippedup at a sharp angle alongside the beak into juxtaposition with the twine reach T6. The use of ythis arm is especially desirable where, because of the width of the package P and its eccentric relation to the knotter as determined by the locating shoulder of the supporting table, the angle of inclination of positioned that a U-shaped projection |35 there- 'on acts as a buier to guide the twine past the the reach T4 is too obtuse for the knotter beak to engage this reach readily. The arm |89 is actuated by a link |9| connected to the rocking knotter carriage |48.

The knotter -beak is then caused to rotate counterclockwise, as viewed in Fig. 5, by action of the bevel gears |60 and |69, to engage and loopl about itself the two twine end reaches 'I4 and T6. After the beak has progressed about half way in its looping rotation, the lower jaw |60 is opened by engagement of a roller IBI with a cam |56 carried by the knotter shaft journal boss |55, so that as the beak approaches completion of the rotation, the jaws will engage the end portions of the twine reaches I"L and 'I'6 between them as shown in Fig. 1. As the knotter beak takes the,

cam |56, under the free end of a leaf spring |62 which yieldingly closes the lower jaw |60 against the upper jaw |59 to grasp the twine ends ready to pull them through the loop of twine encircling the beak and thus complete the knot.

Both the deflection of the twine reach 'll'e and the looping of the twine reaches T4 and T's about the knotter beak results'in drawing the twine wiapsjl2 and 'I'3 tight against the package P,

and due to the incompressibility of the package. places the twine under some tension. This tension is relied upon to function after tying of the y 2,307,658 \mot to absorb the necessary overreach of twine in the final wrap which is required to accommodate the working clearance between the top of the knetter head and the bottom ofthe package. Such clearance is preferably maintained at a minimum by locating thel overlying table portion 34 as close as practicable to the crown of the knetter head.

Tying of the knot is effected by rearward withdrawal of the knetter beak by rocking the carriage MB. At the same time, a cutter carrier '|78 is rocked to drive a cutter blade |83 into severing relation to the end portion of the twine reach T8 while a groove or notch |85 in the cutter carrier engages the initial reach T4 and strips it from the twine catcher. Y

As the knetter beak retreats rearwardly the direction indicated by arrow in Figs. 3, 4 and 6, the encircling loop of twine is stripped from the beak and the beak pulls the twine ends through the loop which promptly tightens thereon due to the tension which has been developed in the twine wraps. According to the present invention, this stripping is edected by means of a stripper Bil which is engageable with the twine loop about the beak immediately back of the twist in the twine on the flat-face left side of the beak. In this instance the stripper BH comprises a finger formed witha rounded beak-opposing heel B|2 and a forwardly projecting narrow, vertically extending stripping edge or tip B|3 (Fig. 8). During the stripping operation, the stripping tip BH3 tends to wedge itself into the angle between the iiat face of the knetter beak and the encircling twine to preclude slipping and riding of the stripper over the twine and failure to strip it.

Although for stripping purposes the stripper Bi i must coact intimately with the knetter beak, the stripper must be cleared from the path of the knetter beak. to permit unobstructed rotation of the latter to loop the twine about itself. Means are therefore provided for reciprocably shifting the stripper between the stripping position and an out-of-the-way position. Due to the limited clearance between the overlying stationary table plate portion 83C and the top of the knetter beak, movement of the stripper relative to the beak in a vertical plane, such as is effected with the stripper of my aforesaid prior patent, is prohibited. However, it is practicable to have the stripper move in a horizontal plane in the narrow space between the frame top Bl@ and the plate portion 8f3". Although the stripper might be pivoted for timed oscillation or arranged for straight line reciprocation toward and from the knetter beak with movement imparted thereto by such means as a radius arm functioning in timed sequence to the operation of the machine, I prefer for certain practical reasons to fashion the stripper BM as an arcuate finger of rectangular cross section movable. on an arc toward and from the knetter beak in response to reciprocations of plate |32.

To this end, the stripper nger Bll is slidably mounted upon the upper face of the frame top plate Bw in a horizontal plane at the level of the knetter beak when in the knot-forming position. An arcuate guide for the vstripper finger com.- prises a sector plate BM which is formed with a pair of spaced concentric arcuate flanges BIS forming a downwardly opening track channel BH complementary to the stripper finger and within which the stripper is reciprocably slidable in a generally front to rear direction. An

integral attachment flange BIB en the sector plate is apertured to receive screws Bl by which the sector plate is flxedly secured to the top of ythe frame plate B|0 adjacent to the forward edge of the latter and clear of the plane of wrapping movement of the twine T. The forward end of the slide track Bll opens toward the normal plane of the flat face of the knetter beak, with the adjacent edge of the sector plate spaced a sufficient distance from the knetter beak to clear the rotational path of the beak point. Through this arrangement, the stripper finger BH can be slid forwardly in the track channel BII into extended or stripping position as indicated by the directional arrow in Figs. 3 and 4, and reversely into the retracted or out of the way position within the track, shown in Figs. 2 and 5.

Both the stripper finger Bll and the sector guide plate BM can be made easily and inexpensively by simple manufacturing processes. Thus. the stripper finger is adapted to beformed from a one-third segment of a metal ring of suitable radius, with the stripping tip end ground down and finished to proper contour. The guide plate B|4 is adapted to be formed from a quarter sector of a turned disc having an annular` channel to provide the track BI1 milled or turned therein and a continuous ange turned down around its periphery and trimmed to provide the attac ment flange BIB as shown. I

Actuation of the stripperflnger BH in timed relation to the knetter is effected by the sliding draw plate |32 through the intermediary of an oscillating cam lever B20 and a transmission link B2i. The cam lever B20 is of a length on the order of twice the extent of the reciprocal movement of the draw plate |32. Adjacent to one end the lever is pivotally secured as by means of a screw B22 to the top of the frame platel Bl 0 near the straight end of the draw plate |32 to extend longitudinally in overlying relation to the rear margin of the draw plate. I'he forward edge of the lever B20 provides a' cam edge which engages an upwardly extending follower or acvtuating pin B23 which is preferably centrally rigid with the draw plate |32 and projects up through a clearance slot B26 in the horizontal frame plate Bl. This slot is of ample dimension to permit entire freedom of movement of the pin B23 throughout its reciprocal path as determined by reciprocations of the slide plate |32.

The cam lever B20 is constantly urged into edgewise engagement with the actuating .pin B23 by preferably resilient means such as a' coiled tensionspring B25 which is secured at one end to the lever as at B21 and at its other end to an anchoringstud B28 projecting up from the frame.

plate B|0 at such a distance spaced forwardly from the lever with respect to the length of the spring as te maintain the spring under constant tension.

For about one half of the extent of reciprocal movement of the slide plate |32 considered from the extreme right-hand position as shown in Fig. 5, a substantially straight, longitudinal cam portion B29 of the forward edge of the cam lever B20 rides against the pin B23. In theremainder of the range of reciprocal movement of the slide plate, a rearwardly diagonal cam' portion B30 forming a continuation of the forward straight cam edge portion B29 rides in engagement with the actuating pin B23 as shown in Fig. 4, and. under the influence of the tensionv spring B25 allows the cam lever B20 to be swung forwardly. 'Ihe angle and length-of the diasonal cam edge portion B30 is predetermined to enable full extension and retraction or the stripper flnger BH as the actuating lpin B23 is shifted in opposite directions from end to end of this diagonal edge portion and the lever B20 is oscillated.

In translating the oscillating motion of the lever B20 into reciprocal arcuate motion of the stripper finger Bl I, the link B2| affords a coupling and lost motion mechanism, being connected by s. pivot pin B3| to the oscillating end of the lever B20 and by a pivot stud B32 to the rear end of the stripper finger. As shown, the pivot stud B32 projects up rigidly from a reduced thickness rear portion B33 of the stripper finger B|| (Fig. 8) which provides an oiset deep enough to accommodate substantially the thickness of the link B2| which, as also the lever B20, is preferably made from a stock that is substantially thinner than the stripper flnger so that the link and lever can both lbe readily manufactured by die stamping. As best seen in Fig.. 7. the rear end portions of the stripper guiding channel ilanges B| are also preferably cut down as indicated at B34, corresponding to the reduced rear portion B33 of the stripper, andthe rear edge of the sector plate Bll is cut away forwardly to clear the link B2 I.

pin B23 when the draw slide |32 is in the extreme twine drawing position as shown in Fiss. 2 and 5. While the drawslide |32isreturnedto cleart-he extension |35 from the, rotational path of the knotter beak, this retracted condition of the stripper finger B|| persists by reason of the length of the lever straight edge B23 and until the knotter beak has completed its twine looping rotation. Then the draw slide |32 is shifted to its extreme limit of separation from the knotter beak whereby to eil'ect forward Swinging of the lever Efllciency in the transmission of motion from ticable. Since this causes the link to swing rather closely to the diagonal cam edge portion B of the lever in the extreme forward swing of the lever, the inner or rear edge of the link B2| is preferably formed on a radius to clear the actuating pin B23 which in that condition of the lever and link is jackknifed therebetween.

Nice adjustment of the stripper actuating mechanism to attain as desirably close as practicable approach of the shoulder B 2 of the stripper nger to the flat side face of the knotter beak, without actual frictional engagement with the beak, is effected through the medium of a set screw B which is engagea'ble with` a forward extension B31 on the transmission link B2I. The adjusting set'screw B35 is threaded through a rigid post B30 extending up from the frame table BII closely adjacent to the edge of the sector B20 by 'reason of the diagonal cam edge portion B30 following the actuating pin B23 as the latter travels with the draw slide. lIhis drives the stripper BH forwardly as indicated by the arrows in Figs. 3, 4 and 6 into stripping position.

By utilizing the draw plate |32 for actuating the stripper B|| in the manner described, it will be apparent that all movements of the stripper mechanism can 'be effected within very limited vertical clearance, and the need is eliminated for special means to actuate the stripper from the driving mechanism of the machine (as is the case in my aforementioned prior patent).

Where narrow or small girth bundles are to be tied so that the twine reach T* Awill extend at 'such a sharp angle upwardly alongside the knotport an elongated bundle of relatively incomplate attachment flange BIB and forwardly spaced from the path of movement of the extension B31 to afford an adjustment clearance through which the tip of the adjusting screw extends for engagement with the forward edge of the extension B31. Lock nuts B33 flx the set screw B35 in adjusted position. Through this arrangement.

the adjustment set screw B35 provides an adjustable limit stop detennin'ative of vthe extent to which the cam lever B23 and the transmission link B2| can drive the stripper finger B|| toward Resilient means, such as a coiled tension spring B43, is connected to the free end of the link extension B31 and exerts a constant forward.

pull on the transmission link, supplementing the action of the lever biasing spring B23, and posipressible small rods or strands such as synthetic bristles or the like, to be tied together. In a typical installation, such an arrangement has been found particularly suitable for tying bun-- dles of synthetic bristles of the plastic material known as Nylon. It will be noted that the twine reach I4 extends up so sharply and closely under and alongside the knetter beak as t0 render it easily engageaible by the beak for knot-looping. In view of the small size of the bundle, operating eillciency is promoted in this modied arrangement of the machine by reducing the radius of rotation of the twine arm 32 so that its orbit will besu'bstantially reduced from that necessary in a machine which is adapted for tying larger bundles or packages such as in Fig. 1.

While I have illustrated a preferred'embodiment of my invention, many modificatiom may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of constniction set forth, but desire to avail myself of all changes within the scope or theappended claims.

I claim:

1. In 'combination in amachlne adapted-for tying relatively incompressible packages or bundles; a nxed support; means for wrapping twine about a package or bundle carried by said support; a twine catcher for ensuing both the starting end reach and the terminating end reach of the twine;- a knotter beak having a position closely adjacent to the starting end reach: means for drawing the terminating end reach of twine' into position to be engaged `by the knotterrbeak;

means forrotating the knotter beak for-enming and looping both'of the twine .end reaches 'aboutitselh means for actuating'said twine drawing means; a stripper movable between a stripping position closely adjacent to the knetter 'beak for stripping the encircling loop of twine fromthebeaktoformtlmeknot,andanout` assauts reciprocable in a path which crosses the path of reciprocation of the slide member but in a different plane.

3. In combination in a, tying machine including means for laying a wrap of twine about a package, `a knotter having a beak for engaging a loop of twine thereabout and grasping a twine end portion between its Alaws for pulling the end portion through the beak-encircling twine loop to complete the knot, `a member movable relative to the beak and cooperating therewith to assist in the engagement of the twine by the beak, and a stripper cooperative with the beak to strip the encircling twine from the bealr by relative motion of the stripper -and the beak, said member being connected with said stripper for shifting the stripper into and out of stripping position relative to the beak in response to movements of the member.

4. A tying machine as set forth in claim 3 in which the beak-assisting member is constructed and arranged to operate from one side of the beak and the stripper to operate from the opposite side of the beak.

5. In combinationin a tying machine including a support for packages or bundles to be tied, means for laying wraps of twine about the packages or bundles, a knotter comprising a beak constructed and arranged to engage a loop of twine about itself andv then withdraw from the loop to pull an end portion oi the twine through the loop to form a knot, and a slidable draw plate for assisting the beak to engage the loop of twine; av stripper mounted below said support and above said draw plate movable toward and away from the beak cooperative to strip the loop of twine therefrom upon withdrawal from the loop, and means connecting the stripper for actuationA by said draw plate. 6. A tying machine as dened in claim 5 in which a machine frame plate lies between the draw plate and the stripper, said frame plate having an opening therethrough over said draw plate, and the connecting means includes a member carried by said draw plate projecting up therefrom through said opening.

'7. A tying machine as defined in claim 5 in which the connecting means comprises a iixed member projecting from the draw plate, and lever mechanism actuated by said projecting member.

8. In combination in a tying machine including a knotter having a beak, twine engaging means movable relative to the beak for assisting in placing a reach of twine adjacent to the beak to be in'part looped thereabout and in part grasped between the jaws of the beak to be pulled through the loop in tying the knot, and a stripper actuated by said twine-engaging means for stripping the twine loop from the beak.

9. In combination in a machine for tying bundies or packages. a knotter including an' intermittently rotatable twine looping and knotting beak, a stripper finger arranged to cooperate with the beak for stripping a twine loop therefrom, guide means for slidably supporting said stripper ringer for reciprocation to carry itinto and out of stripping relation to the beak, and means for reciprocating the iinger in timed relation to the intermittent rotations of the beak.

l0. A tying machine as defined in claim 9 in which a fixed base stationarily supports the guide means and slidably supports the stripper finger,

and the guide means comprises a member having a downwardly opening channel within which the stripper finger is reciprocably slidable.

11. In combination -in a tying machine, an intermittently operable knotter beak, an arcuate stripper finger, means including an arcuate track for guiding said stripper nger for endwise stripping coaction with the beak, and means for reciprocating the stripper finger in said-track into and out of stripping position relative to the beak in timed relation to operation of said beak.

12. In combination in a tying machine including a knetter beak adapted to engage a loop of twine about itself and pull an, end portion of the twine through the loop to tie a knot, guide means for slidnbly supporting a stripper nger, a reciprocable stripper finger slidably supported by said guide means and having one end formed to coact with 'the beak in stripping the twine loop from the latter to eiect said drawing through of the twine end, and finger-reciprocating means engaging said stripper finger at the end opposite the stripping end.

13. A tying machine comprising in combination, a knetter beak, a reciprocable draw plate, a stripper nger adapted to cooperate at one end with said beak to strip a twine loop therefrom in tying of a knot, means for guiding said stripper iinger for reciprocation, mechanism for reciprocating said stripper ringer including an oscillating cam lever, and means on said draw plate providing a follower engaged by said ca'm lever for veiecting oscillation of the lever in response to reciprocations of the plate.

14. A tying machine as defined in claim 13 in which the draw plate and the cam lever are separated by an intervening supporting frame structure having an opening therethroughaiording clearance for the follower which is in the form of a pin projecting from the draw plate through the opening, and resilient means anchored to the frame structure constantly urging the lever against the follower pin.

l5. In combination in a tying machine, a rotatable knotter beak, an elongated stripper nger having one end fashioned to cooperate, with the beak for stripping a loop of twine therefrom in the tying of a knot, means providing a track for slidably guiding the stripper ringer in a reciprocal path directed toward the beak, an oscillatable actuating lever mounted with its oscillating end adjacent to but spaced from the end of the stripper finger opposite the stripping end, a link connecting the operating end of the lever with th'e adjacent end, of the stripper finger-for translating oscillating motion of the lever into linear reciprocal motion of the stripper linger and means for oscillating the actuating lever in timed relation to rotation of said beak.

16. A tying machine as dened in claim 15including resilient means acting upon the lever and the transmission link to urge them constantly in one direction.

17. A tying machine as deiined in claimil including means for adjusting the extent to which the actuating lever Aand transmission link will drive the stripper nger toward the beak.

erative with the beak, an oscillating actuating lever for the stripper, a link connecting the lever and the stripper and having an extension projecting beyond the stripper, and an adjustable limit stop engageable by said extension for controlling the nearness of approachof the stripper to the beak.

19. In combination in a tying machine including a knotter having a knot tying beak, a stripper guided for linear reciprocatlon into and out of stripping position relative to said beak, and means for reciprocating said stripper including beak :,semss an oscillating lever having a lost motion connection with the stripper.

20. In combination ln a machine for tying relatively incompressible packages or bundles, twine wrapping means. a knotter including a. twine looping and knot tying beak,. a iixed support closely overlying said beak, horizontally extending guide means, and an elongated stripper slidably engaging said guide means below said sup. port and movable into side proximity with said BENJAMIN H. BUNN. 

